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ACID PRO 4.0 is the latest version of Sonic Foundry's award-winning loop-based music creation tool that allows professionals to produce original, royalty-free music. Use ACID to create songs, remix tracks, produce 5.1 surround audio mixes, develop music beds, score videos and create music for web sites and Flash animations. While this revolutionary tool is intuitive and easy to use, its powerful enough for professional production. Work with a huge assortment of loops in multiple genres. ACID lets users compose using unlimited tracks of audio and MIDI, import and Beatmap complete songs. ACID PRO saves to a variety of formats such as WAV, WMA, RM, AVI, and MP3.